MSP TM Metatarsal Shortening System. Surgical Technique

Transcription

1 MSP TM Metatarsal Shortening System Surgical Technique

2 Metaphyseal/Diaphyseal osteotomy does not result in plantar displacement of metatarsal head Osteotomy guide integrated into implant allows for controlled shortening (up to 6mm) Keeled design aids in implant positioning and fixation strength T6 Driver 1.8mm AO Drill MSP Plate Drill Bushing Proximal Drill Guide DOG-LEG SLOT The MSP Metatarsal Shortening System is manufactured using Ti 6-4 ELI.

3 Surgical Technique DRILL BUSHING Select the left or right implant kit based on the operative foot. The keel is oriented medially, and the dog-leg slot is oriented proximally. The distal edge of the plate is positioned approximately 5mm proximal to the metatarsal head. Thread the MSP Drill Bushing into the distal hole of the MSP Plate. Do not overtighten. DOG-LEG SLOT DISTAL PROXIMAL KEEL Place the MSP Plate on the dorsal surface of the bone. Ensure the MSP Drill Bushing is in a vertical position. Apply dorsal and medial pressure to plate to ensure complete plate-tobone contact while drilling. NOTE: Clamp may be used (not provided) 3. Use the 1.8mm AO drill bit to drill the distal hole. Drill a hole through the MSP Drill Bushing, into the bone. Use the markings on the AO Drill to measure the screw length at the top of the MSP Drill Bushing and select the appropriate length locking screw. Remove the drill bushing. Place the Locking Screw in the distal hole and fully tighten

4 4. Thread the drill bushing into the second distal hole and use the AO drill bit to drill the second distal hole. Use the markings on the AO Drill to measure the screw length at the top of the MSP Drill Bushing and select the appropriate length locking screw. Remove drill bushing. Place a Locking Screw in the second distal hole and fully tighten NOTE: Ensure the keel is in contact with the medial cortex. Using the MSP Proximal Drill Guide, drill a hole into the bone in the proximal end of the dog-leg slot. Drill as far proximal as possible. Measure the screw length at the top of the MSP Proximal Drill Guide and select the appropriate length Cortical Screw. Place the Cortical Screw, but do not fully tighten. Note: Use the end with the single groove and apply medial pressure to the plate while drilling to ensure complete bone-to-plate contact. Alternate Order for Screw Placement 1 Drill and insert screws in the following order: 1. Most distal hole 2. Dog-leg slot 3. Second distal hole 4. Proceed to step 6 as usual NOTE: The alternate screw placement technique may help ensure consistent, optimal lateralization of the implant. For both the standard and alternate screw placement technique, it is critical to apply medial pressure to the plate while drilling to confirm complete bone-to-plate contact Using an oscillating saw, cut the bone obliquely through the cutting guide in the MSP Plate. The saw will be perpendicular to the dorsal surface of the MSP Plate.

5 Shorten the metatarsal by moving the bone proximally to the desired length. A total correction of 6mm is achieved if the screw reaches the most distal edge of the dog-leg slot. Fully tighten the dog-leg screw. Using the double-groove side of the MSP Proximal Drill Guide, insert the AO drill bit into the second proximal hole and drill. Use the markings on the AO Drill to measure the screw length at the top of the MSP Drill Bushing and select the appropriate length Cortical Screw. Place the Cortical Screw in the remaining proximal hole and fully tighten. NOTE: Drill guide offsets AO drill to create 0.5mm compression across osteotomy. 9.1 For supplemental compression of the osteotomy prior to drilling the final screw hole, a clamp may be used. The MSP Plate has a divot on the keel for this purpose. NOTE: Clamp not provided.

6 36.5 mm 7 mm 15 degrees 1.1 mm wide cutting slot 0.5 mm compression hole 6 mm Part No. MS-SSR MS-SSL ORDERING INFORMATION Description MSP TM Metatarsal Shortening System Sterile Procedure Kit - Right 36.5 MSP TM Plate - Right, 1.8mm AO Drill, MSP TM Driver, MSP TM Drill Bushing, MSP TM Proximal Drill Guide MSP TM Metatarsal Shortening System Sterile Procedure Kit - Left 36.5 MSP TM Plate - Left, 1.8mm AO Drill, MSP TM Driver, MSP TM Drill Bushing, MSP TM Proximal Drill Guide ORDERING INFORMATION - LOCKING SCREWS Part # Description MS-2408L 2.4mm Diameter Locking Screw - 8mm Length MS-2410L 2.4mm Diameter Locking Screw - 10mm Length MS-2412L 2.4mm Diameter Locking Screw - 12mm Length MS-2414L 2.4mm Diameter Locking Screw - 14mm Length MS-2416L 2.4mm Diameter Locking Screw - 16mm Length MS-2418L 2.4mm Diameter Locking Screw - 18mm Length ORDERING INFORMATION - NON-LOCKING SCREWS Part # Description MS mm Diameter Cortical Headed Screw - 8mm Length MS mm Diameter Cortical Headed Screw - 10mm Length MS mm Diameter Cortical Headed Screw - 12mm Length MS mm Diameter Cortical Headed Screw - 14mm Length MS mm Diameter Cortical Headed Screw - 16mm Length MS mm Diameter Cortical Headed Screw - 18mm Length This surgical technique guide provides a recommended procedure for using MSP Metatarsal Shortening System. The content provided puts forth technique guidance, however, the surgeon must consider the individual needs of the patient making appropriate adjustments when and as required. Nextremity Solutions and MSP are trademarks of Nextremity Solutions, Inc. Zimmer Biomet is the exclusive distributor of the MSP Metatarsal Shortening System. The MSP Metatarsal Shortening System is manufactured using Ti 6-4 ELI.. Patented Nextremity Solutions LIT-1502 Rev.04 Manufactured by: 210 N. Buffalo St. Warsaw, IN U.S.A. (732) nextremitysolutions.com Distributed by: 1800 West Center St. Warsaw, Indiana USA (800) contactus@zimmerbiomet.com